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Why does the unit make hissing and gurgling sounds?

April 26, 2017gurgling hissing Sounds

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Why does the unit make hissing and gurgling sounds?

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The refrigerant flowing inside the air conditioner causes a soft hissing or gurgling sound when the air conditioner is turned on or off. These are normal operational noises. During the first 2-3 minutes of operation, the air conditioner may be louder due to the compressor starting up.